From: Hiroshi Doyu <hdoyu@nvidia.com>
Date: Thu, 2 Aug 2012 08:46:40 +0000 (+0300)
Subject: iommu/tegra: smmu: debugfs for TLB/PTC statistics
X-Git-Tag: v3.7-rc1~93^2^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=39abf8aa7dfad0badb4741373023cda369aacc8e;p=pandora-kernel.git

iommu/tegra: smmu: debugfs for TLB/PTC statistics

Add debugfs entries to collect TLB/PTC statistics.

  $ echo "reset" > /sys/kernel/debug/smmu/mc/{tlb,ptc}
  $ echo "on" > /sys/kernel/debug/smmu/mc/{tlb,ptc}
  $ echo "off" > /sys/kernel/debug/smmu/mc/{tlb,ptc}
  $ cat /sys/kernel/debug/smmu/mc/{tlb,ptc}
  hit:0014910c miss:00014d22

  The above format is:
  hit:<HIT count><SPC>miss:<MISS count><SPC><CR+LF>

  fscanf(fp, "hit:%lx miss:%lx", &hit, &miss);

Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---

Reading git-diff-tree failed